BewareMyPower commented on issue #7327:
URL: https://github.com/apache/pulsar/issues/7327#issuecomment-653651172
I cannot reproduce the problem, assuming your code is like:
```c++
#include <iostream>
#include <string>
#include <pulsar/c/client.h>
int main(int argc, char* argv[]) {
if (argc < 2) {
std::cerr << "Usage: " << argv[0] << " service-url" << std::endl;
return 1;
}
std::string topic = "Foo";
std::string service_url = argv[1];
auto m_conf = pulsar_client_configuration_create();
auto m_client = pulsar_client_create(service_url.c_str(), m_conf);
auto producer_conf = pulsar_producer_configuration_create();
pulsar_producer_configuration_set_batching_enabled(producer_conf, 0);
pulsar_producer_configuration_set_max_pending_messages(producer_conf,
10000);
pulsar_producer_t* producer = NULL;
auto err = pulsar_client_create_producer(m_client, topic.c_str(),
producer_conf, &producer);
if (err != pulsar_result_Ok) {
pulsar_producer_configuration_free(producer_conf);
return 1;
}
return 0;
}
```
The running result:
```
$ ./examples/SampleProducer pulsar://127.0.0.1:5678
2020-07-04 02:32:31.475 INFO [140369736358592] ConnectionPool:85 | Created
connection for pulsar://127.0.0.1:5678
2020-07-04 02:32:31.477 ERROR [140369636267776] ClientConnection:385 |
[<none> -> pulsar://127.0.0.1:5678] Failed to establish connection: Connection
refused
2020-07-04 02:32:31.477 INFO [140369636267776] ClientConnection:1372 |
[<none> -> pulsar://127.0.0.1:5678] Connection closed
2020-07-04 02:32:31.477 ERROR [140369636267776] ClientImpl:180 | Error
Checking/Getting Partition Metadata while creating producer on
persistent://public/default/Foo -- ConnectError
2020-07-04 02:32:31.477 INFO [140369636267776] ClientConnection:235 |
[<none> -> pulsar://127.0.0.1:5678] Destroyed connection
```
Could you provide your log? In addition, could you use a higher version GCC
to debug? Your backtrace lost some debug info because of libstdc++'s BUG, see
[How we discovered why C++ exceptions disappear in stack
trace](https://le.qun.ch/en/blog/libstdc++-bug/)
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